Not sure what you have been seeing or what you are looking at. The "refund monitor" on your screen can change a lot while you are still entering your data. You cannot take that monitor seriously until ALL of your information has been entered. If you are still unsure about your refund or tax due, then please look at your actual tax return. If you are getting a federal refund it will be shown on line 20 of your Form 1040. If you owe federal tax it will be on line 23 of the Form 1040.
https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing
Click on Tax Tools on the left side of the screen. Click on Tools. Click on View Tax Summary. Click on Preview my 1040 on the left side of the screen.
And if the amount still seems "exhorbitant" ---- did you make a decimal mistake or add a zero somewhere as you entered your data? Watch out for hitting the comma instead of the decimal. They are next to each other on the keyboard so it is easy to strike the wrong key. Check the income amounts you entered if the refund is unrealistically high.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
